search for: heteroscedacity

I?m trying to find datasets that will give me residuals, after applying the lm function, with no normality, non linearity, and heteroscedacity so I can try to exemplify those cases in the linear regression model. Can you give any advice on what datasets would be appropiate? I can?t use the ones in the alr3 package because those have already been seen in class. Thank you very much :-) natorro -- This message has been scanned for viru...

...design is unbalanced because of missing values Second, the variances across the different treatments and patchiness levels is not equal (probably due to the patchiness level changes) Third, the second parameter and the fact that the values are in a way discrete produce a non normal distribution and heteroscedacity in my residuals if is ignore everything and run the above model. So is there still a way to tell if there is a difference in length for the different patchiness levels and treatments? Kind regards, Koen -- Checked by AVG Free Edition. 5:32 [[alternative HTML version deleted]]